Adapter



FIG. 1 is a perspective view of an adapter embodying the design of the present invention;

FIG. 2 is a reverse perspective view of the adapter of FIG. 1;

FIG. 3 is a side view of the adapter of FIG. 1;

FIG. 4 is a side view of the adapter of FIG. 1;

FIG. 5 is an end view of the adapter of FIG. 1; and,

FIG. 6 is a reverse end view of the adapter of FIG. 1. 

The ornamental design for an adapter, as shown and described. 